1 files changed, 11 insertions, 0 deletions
diff --git a/iseq.c b/iseq.c
index 0ca697ceb8..3cfb7602d0 100644
--- a/iseq.c
+++ b/iseq.c
@@ -12,6 +12,7 @@
 #include "internal.h"
 #include "ruby/util.h"
 #include "eval_intern.h"
+#include "builtin.h"
 
 #ifdef HAVE_DLADDR
 # include <dlfcn.h>
@@ -559,6 +560,8 @@ prepare_iseq_build(rb_iseq_t *iseq,
 
     ISEQ_COMPILE_DATA(iseq)->ivar_cache_table = NULL;
 
+    ISEQ_COMPILE_DATA(iseq)->builtin_function_table = GET_VM()->builtin_function_table;
+
     if (option->coverage_enabled) {
 	VALUE coverages = rb_get_coverages();
 	if (RTEST(coverages)) {
@@ -1968,6 +1971,14 @@ rb_insn_operand_intern(const rb_iseq_t *iseq,
 	}
 	break;
 
+      case TS_BUILTIN:
+        {
+            const struct rb_builtin_function *bf = (const struct rb_builtin_function *)op;
+            ret = rb_sprintf("<builtin!%s/%d>",
+                             bf->name, bf->argc);
+        }
+        break;
+
       default:
 	rb_bug("unknown operand type: %c", type);
     }